Here's a good link.
http://www.kichline.com/chuck/fixit/mowers/tcarb/tcarb.html
--Hop
>From: jon@dakota-truck.net
>   One weird thing with this carb is that it doesn't even seem to have
>traditional needle jets.  I'm definitely no carb expert (carbeurator is
>French for "leave it alone") ;-) but I have some experience with changing
>out and adusting jets in my motorcycle and 2 stroke ultralight.  The
>only thing in this carb that resembles a jet is there is a tube that dips
>down into the float bowl, and it sticks up into the venturi passageway.
>There is a screw on the bottom of the carb that moves a needle up and
>down below this tube, it looks like the purpose of the needle is to
>restrict the flow of gas through this tube.  There's another orifice that
>appears to allow gas to come up into the venturi which has a similar sort
>of arrangement, a screw that adjusts the size of the opening that the gas
>can flow through.  Besides those two screws, there aren't any other
>adjustments on the carb.  I don't know enough about carbs to be able
>to tell if one is a power circuit and another is idle, etc.  Neither
>screw looks like a traditional needle jet; they must be serving the
>same purpose, but they are rather crude.
>
>
>--
>                                           -Jon-
>
>   .- Jon Steiger --- jon@dakota-truck.net or jon@jonsteiger.com -.
>   |    67 Dodge Coronet, 70 Plymouth Barracuda, 76 Peugeot TSA   |
>   | 78 Dodge B100, 90 Dodge Dakota Convertible, 92 Dodge Ram 4x4 |
>   |   96 Dodge Dakota, 96 Suzuki Intruder 1400, 96 Kolb FireFly  |
>   |          99 Jeep Cherokee 4x4, 01 Dodge Ram 3500 CTD         |
>   `--------------------------------- http://www.jonsteiger.com --'
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